I have a carbine in .177, and I think I get 40 or, from a 200 bar fill, to the reg set point, but not sure. Mine is a yard and plinking gun, so I don't really watch it closely.
I kept researching that myself for quite a while. An HW100 was high on my shortlist for quite a while. I wanted a higher-end .177 for 90% target plinking. That shot count (40) ruled it out for now. A forty shot shooting session without interruption was not enough. I ended up wit a Impact Mk2.... so far so good!
Not sure in the .177, however in the 5.5mm we constantly get 42 shots (3 magazines) out of the box no adjustments. This is the TK model, which is a carbine length barrel with the standard size reservoir. I would expect more than 40 shot out of the .177.